semiochemical

 
Pronunciation: /ˌsiːmɪə(ʊ)ˈkɛmɪk(ə)l/

noun

Biochemistry
  • a pheromone or other chemical that conveys a signal from one organism to another so as to modify the behaviour of the recipient organism.

Origin:

1970s: from Greek ēmeion 'sign' + chemical